package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections4.map.HashedMap;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    private final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";

    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        log.info("开始获取openId");
        String openid = getOpenId(userLoginDTO);
        log.info("获取openId成功：{}", openid);
        //判断openid是否为空 为空直接抛出异常
        if (openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断是否是新用户
        User user = userMapper.getByOpenID(openid);
        if (user == null) {
            //如果是新用户 则注册
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }

        return user;
    }

    public String getOpenId(UserLoginDTO userLoginDTO) {
        //调用微信接口服务，获得当前微信用户的openid
        //构造请求信息
        String js_code = userLoginDTO.getCode();
        String appid = weChatProperties.getAppid();
        String secret = weChatProperties.getSecret();
        String grant_type = "authorization_code";


        //请求微信接口服务
        Map<String, String> paramMap = new HashedMap<>();
        paramMap.put("appid", appid);
        paramMap.put("secret", secret);
        paramMap.put("js_code", js_code);
        paramMap.put("grant_type", grant_type);

        String json = HttpClientUtil.doGet(WX_LOGIN_URL, paramMap);  //这个方法返回的是json对象

        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;
    }
}
